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This skill guides the implementation of envelope encryption using AWS Key Management Service (KMS). Envelope encryption is a robust security pattern where data is encrypted locally using a Data Encryption Key (DEK), and the DEK itself is protected by a master Key Encryption Key (KEK) managed by AWS KMS. This approach overcomes the limitations of direct KMS encryption, enabling unlimited data size encryption, reducing latency, and allowing offline encryption capabilities by keeping the master key secure in an HSM.

This skill provides comprehensive procedures for identifying and remediating Amazon S3 bucket misconfigurations. It covers enabling Block Public Access settings, auditing policies and ACLs, enforcing default encryption (KMS/AES), and utilizing AWS Config/Lambda for automated remediation. It is essential for maintaining data compliance and responding to security incidents.

This guide details establishing confidential computing environments using AWS Nitro Enclaves for hardware-level isolation. It covers building secure enclaves for sensitive data (PII, PHI), configuring cryptographic attestation workflows, and integrating KMS policies using PCR-based conditions. Learn to harden workloads by moving secret decryption into isolated, verifiable hardware boundaries.